org.apache.calcite.sql.babel.postgresql.SqlCommit Maven / Gradle / Ivy
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.calcite.sql.babel.postgresql;
import org.apache.calcite.sql.SqlCall;
import org.apache.calcite.sql.SqlKind;
import org.apache.calcite.sql.SqlLiteral;
import org.apache.calcite.sql.SqlNode;
import org.apache.calcite.sql.SqlOperator;
import org.apache.calcite.sql.SqlSpecialOperator;
import org.apache.calcite.sql.SqlWriter;
import org.apache.calcite.sql.parser.SqlParserPos;
import org.apache.calcite.sql.type.ReturnTypes;
import com.google.common.collect.ImmutableList;
import org.checkerframework.checker.nullness.qual.Nullable;
import java.util.List;
/**
* Parse tree node representing a {@code COMMIT} clause.
*
* @see COMMIT specification
*/
public class SqlCommit extends SqlCall {
public static final SqlSpecialOperator OPERATOR =
new SqlSpecialOperator("COMMIT", SqlKind.OTHER_FUNCTION, 32, false, ReturnTypes.BOOLEAN, null,
null) {
@Override public SqlCall createCall(@Nullable final SqlLiteral functionQualifier,
final SqlParserPos pos,
final @Nullable SqlNode... operands) {
return new SqlCommit(pos, (SqlLiteral) operands[0]);
}
};
private final SqlLiteral chain;
protected SqlCommit(final SqlParserPos pos, final SqlLiteral chain) {
super(pos);
this.chain = chain;
}
@Override public SqlOperator getOperator() {
return OPERATOR;
}
@Override public List getOperandList() {
return ImmutableList.of(this.chain);
}
@Override public void unparse(final SqlWriter writer, final int leftPrec, final int rightPrec) {
writer.keyword("COMMIT");
if (this.chain.symbolValue(AndChain.class) == AndChain.AND_CHAIN) {
writer.literal("AND CHAIN");
}
}
}